The Problem Solvers Cassette Spacers are made of light and durable anodized aluminum and come in different thicknesses for correctly spacing various brand and model cassette cogs. Measure and match your spacers to choose the right width.

When you need to move your handlebars up, install Sunlite's Chromoly Quill Stem Extender. One end goes inside the steerer tube and your quill stem inserts into the top. It provides 8 1/4 inches of rise and is compatible only with quill stems and steerer tubes.

This kit includes a Greenfield center-mounted kickstand as well as a mounting plate that's designed with a cutaway to clear derailleur cables. The kickstand is lightweight, durable, and looks great on any bike. It's made of aluminum and made in the USA.
- 285 mm (for bikes 22" and under), 305 mm (for bikes 22" and over)
- Certified Non-Corrosive Casting
- Snap Action Mechanism
- Non-Slip Clamping Surface

The Problem Solvers Seatpost Shim is what you need when your seatpost is a little too small-diameter to fit tightly into your frame. It's made of light, durable aluminum and has a lip on the top so it won't slide down inside the frame during installation.

The Problem Solvers Chain Tensioner is a handy device when you're building a singlespeed bike and need to remove slack in the chain and keep it running smoothly. It's made of light and durable CNC-machined 6061 aluminum with steel hardware and has efficient, long-lasting nylon pulleys. It simply screws onto your frame's derailleur hanger. It even lets you adjust your chainline, too.

Profile Design's Multi-Fit System Kit allows early model Profile Design aero bars to work with 26.0mm and 31.8mm handlebars. This fine 6061-aluminum upgrade gives you the excellent adjustability of Profile's F-19 armrests that feature length, width and rotational settings. You'll also appreciate the supportive, comfortable Lycra-covered foam F-19 pads. Plus, on the Flip-Up model, the brackets flip up and out of the way so that you can hold onto the tops of the base bar and stand and climb with no worries about your knees hitting the armrests.

- Simple tension seeker (STS) allows the use of a 1 speed drivetrain on a vertical drop frame
- Perfect for street or dirt jump where simplicity and durability is key
- Stainless steel arm mounts to derailleur hanger and dropout
- Loosen bolt and swing down and back to adjust chain tension
- High density polyurethane pulley with sealed cartridge bearings

This is the correct plug-and-play wire for Shimano's E-Tube Di2 electric-shifting systems. It comes in sixteen different lengths, so choose the one(s) that's right for your Di2 E-Tube wiring configuration.

The Problem Solvers Cross Clamp mounts to the seat tube on your frame so that you can make your top-routed shift cables work with a bottom-pull front road derailleurs. This is a common setup on cyclocross bicycles. Choose the diameter that matches your frame.

The Problem Solvers Clamp-On Water Bottle Cage Mount makes it easy to carry a bottle on your handlebars so you can have even more refreshment on rides. It also comes in useful on frames without room for bottles, like smaller frames and some kid’s bikes.

The Problem Solvers Inner Chainring Bolts include 5 of the special threaded chainring bolts that fit into the chainring nuts on your crankset to hold the chainrings in place (chainring nuts sold separately). This type is 12.5mm long and made of durable chromoly.

The Problem Solvers Wide Cable Carrier is 50mm wide and that lets you mount it lower than conventional hangers, which in turn provides greater leverage for additional braking power. This fine aluminum brake-cable carrier is especially handy for cyclocross brake setups. The extra clearance also makes it perfect for use with fenders.

The Problem Solvers Clamp-On Cable Guides are for clamping on the rear brake cable housing on your frame when the frame doesn't have provisions for holding a full-length brake cable housing. You get 3 stainless-steel clamps and the nuts and bolts for them.

Profile Design's J4 Bracket Kit lets you fine-tune your aero position down to the millimeter. For lightness, strength and aerodynamics, the brackets are made of forged and CNC-machined 6061 aluminum and have Marine-quality 12.9-grade bolts that are corrosion-resistant and hidden. For easy and fast adjustability, by simply loosening the fixing bolt on each side you can slide your extensions in and out. Meanwhile, the brackets hold the armrests set back 20mm from the center of the base bar or you can reverse the armrests for a forward position. You can also stack aftermarket risers on the brackets to raise the armrests (armrests, risers and extensions sold separately).

The Problem Solvers BB30/Press-Fit 30 Adapter Kit consists of DuPont Delrin (a tough, light type of plastic) pieces that allow you to use your external bottom bracket-style crankarms (24mm spindles, such as a Shimano Hollowtech II crank) with newer BB30 and Press-Fit 30 bottom brackets. Please contact us if you have any questions about compatibility.

The Problem Solvers Cable Pulley is the correct replacement for their Cross Clamp pulley (Cross Clamp sold separately) and it will also work on most frames that have a mount for a pulley. You get the aluminum pulley and the brass bushing.